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Re: Flora and Fauna of Dinosaur Park Formation

In a message dated 6/6/99 1:16:31 PM EST, granth@cyberus.ca writes:

<< Chirostenotes elegans (= Caenagnathus sternbergi)
 Elmisaurus elegans >>

I think these two species are the same, both being renamings of Ornithomimus 
elegans. The oldest available species name for this taxon would be 
Chirostenotes pergracilis, of which all the described American caenagnathid 
species are synonyms. Differences are considered to be due to individual 
variation and sexual dimorphism. (E.g., Caenagnathus collinsi is one sex, C. 
sternbergi the other.)